|
Ice cores from Greenland show that warming and cooling episodes occurred every several thousand years, superimposed on the slower advances and retreats of the northern ice sheets. |
中文意思: 采自格陵兰的冰心显示,每隔几千年,地球就会重复一次暖化和冷却的事件,时间刚好和北半球冰原缓慢前进与消退的现象重叠。 |
以下为相关句子列表(点击查看,可以看对应的解释):
|
|
|